Add support for jumping in ordered author list by typing letters

CHANGELOG.md

@@ -20,6 +20,7 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We created a new install screen for macOS. [#5759](https://github.com/JabRef/jabref/issues/5759)
 - We implemented an option to download fulltext files while importing. [#6381](https://github.com/JabRef/jabref/pull/6381)
 - We fixed the bug when strike the delete key in the text field. [#6421](https://github.com/JabRef/jabref/issues/6421)
+- We added support for jumping to target entry when typing letter/digit after sorting a column in maintable [#6146](https://github.com/JabRef/jabref/issues/6146)
 
 ### Changed
 

src/main/java/org/jabref/gui/maintable/MainTable.java

@@ -12,6 +12,7 @@
 
 import javafx.collections.ListChangeListener;
 import javafx.scene.control.SelectionMode;
+import javafx.scene.control.TableColumn;
 import javafx.scene.control.TableRow;
 import javafx.scene.control.TableView;
 import javafx.scene.input.ClipboardContent;
@@ -62,6 +63,19 @@ public MainTable(MainTableDataModel model, JabRefFrame frame,
                      MainTablePreferences preferences, ExternalFileTypes externalFileTypes, KeyBindingRepository keyBindingRepository) {
         super();
 
+        this.setOnKeyTyped(key -> {
+            if (this.getSortOrder().size() == 0) {
+                return;
+            }
+            final char keyChar = key.getCharacter().charAt(0);
+            final TableColumn<BibEntryTableViewModel, ?> sortedColumn = getSortOrder().get(0);
+            final int target_row_index = this.getEntryIndexByInput(sortedColumn, keyChar);
+            if (Character.isLetterOrDigit(keyChar) && target_row_index != -1) {
+                this.scrollTo(target_row_index);
+                this.getSelectionModel().clearAndSelect(target_row_index);
+            }
+        });
+
         this.model = model;
         this.database = Objects.requireNonNull(database);
 
@@ -123,6 +137,19 @@ public MainTable(MainTableDataModel model, JabRefFrame frame,
         database.getDatabase().registerListener(this);
     }
 
+    private int getEntryIndexByInput(TableColumn<BibEntryTableViewModel, ?> column, char target_char) {
+        for (int i = 0; i < this.getItems().size(); ++i) {
+            Object temp = column.getCellObservableValue(i).getValue();
+            if (temp == null) {
+                continue;
+            }
+            if (temp.toString().toLowerCase().charAt(0) == target_char) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
     @Subscribe
     public void listen(EntriesAddedEvent event) {
         DefaultTaskExecutor.runInJavaFXThread(() -> clearAndSelect(event.getFirstEntry()));